I have a 1 TB solid-state drive has my main hard drive, with two other internal hard drives. I haven't had any problems with Lightroom and catalogs on the 1 TB drive. My catalog and Lightroom are both on the solid-state drive. It seems to me that something else must have been interfering, but I don't know for sure.
I'm not sure if this is the answer but I have had issues with my Catalog for a while. In the end, I decided to create a whole new catalog in a different folder and, in essence, start from scratch.
It's not as bad as it sounds though! What I did was to Export my entire image database via File>Export as Catalog to a new catalog "LR 73 NEW" and then open it up in LR Classic. It's sped up my LR CCC dramatically and the process seems to have done some kind of "deep clean" in the process.
It might simply be your catalog has a number of (minor) inconsistencies in it which means the update fails as a result.
Worth a try?
But my update didn't fail, my backups don't fail, and I don't have any problems. Why would you think I should create a new catalog when I'm not having any issues?
You said the update to LR failed. You said the work around was to create a new catalog. I *suggested* a different approach. Sorry if that rattled your cage. I'll keep my ideas to myself next time.
Sorry fella but you were answering the other guy. I was the originator of this issue. I had never really put anything in a catalog with the earlier version of Lightroom Classic CC. But when Adobe notified me that there were several updates I just opened the Cloud App and said update all. Every time the new version of Lightroom Classic CC would try and install it got to 99% and then would just bomb out and the error code was 156. I thought there might be something to do with the upgrade I did when I cloned my old 256 GB hard drive to a new ! TB version. Had no problems with any other program I needed to update. Just for grins I decided on trying to create the catalog folder on a different drive and for some reason that worked. I have not put anything into that folder yet. But the Lightroom Classic CC software seems happy, but I would like it to be in the bug drive for obvious reasons. Hope this explains things better. I appreciate any help in figuring out why that folder cannot be created on my main drive.
Thanks JimHess. Nice to see that someone else did an upgrade and everythig worked fine. I am using Win 10 Pro and I am on the fast ring release version and the MS releases do cause some issues once in a while. LOL If I remember right I am on release 17333.1. I just tried to go look to see what the version was but of course the software isn't cooperating. LOL. Go figure. Thanks for your reply.